NΩ dibaryon from lattice QCD near the physical point
نویسندگان
چکیده
منابع مشابه
Evidence against a stable dibaryon from lattice QCD.
We have used standard numerical techniques of lattice quantum chromodynamics (QCD) to look for evidence of the proposed doubly strange spin zero dibaryon (the H particle), and to determine the splitting between the mass of the H and the mass of two d’s: its lightest possible strong decay channel. We find that the dibaryon is above the two A threshold, making it unstable to strong decay. The rel...
متن کاملEvidence for a bound H dibaryon from lattice QCD.
We present evidence for the existence of a bound H dibaryon, an I=0, J=0, s=-2 state with valence quark structure uuddss, at a pion mass of m(π)∼389 MeV. Using the results of lattice QCD calculations performed on four ensembles of anisotropic clover gauge-field configurations, with spatial extents of L∼2.0, 2.5, 3.0, and 3.9 fm at a spatial lattice spacing of b(s)∼0.123 fm, we find an H dibar...
متن کاملPresent Constraints on the H-dibaryon at the Physical Pointfrom Lattice QCD
The current constraints from lattice QCD on the existence of the H-dibaryon are discussed. With only two significant lattice QCD calculations of the H-dibaryon binding energy at approximately the same lattice spacing, the forms of the chiral and continuum extrapolations to the physical point are not determined. In this brief report, we consider the constraints on the H-dibaryon imposed by two s...
متن کاملEvidence for a bound H-dibaryon using lattice QCD
The H-dibaryon, a J = 0 state with the valence quark content udsuds, has long been hypothesised to exist because of the attractive nature of colour magnetic gluon exchange in the flavoursinglet channel. Using lattice QCD the NPLQCD collaboration have investigated this system and evidence is presented for the existence of a stable H-dibaryon, albeit at a quark mass somewhat larger than that in n...
متن کاملPhysical nucleon properties from lattice QCD.
We investigate various resummations of the chiral expansion and fit to the extremely accurate lattice QCD data for the mass of the nucleon recently obtained by the CP-PACS group. Using a variety of finite-range regulators, we demonstrate a remarkably robust chiral extrapolation of the nucleon mass. The systematic error associated with the chiral extrapolation alone is estimated to be less than 1%.
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2019
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2019.03.050